Method of separating anethol from pine oil



L. "'r. SMITH METHOD 0F SEPARATING ANETHOLvFROM PINE OIL Oct. 7, 1930. Y

Filed Aug. l1, 1927 SQ SS@ qm Sima@ .S 5m@ kmr@ Nm fr/V555.' I @77ml Patented Oct. 7, 1930 UNITED sTivmsA LEE T. SMITH, oF KENVIL, NEW JERSEY, lgssiqiyoniaiognnnpniis@owning oF WILMINGTON, DELAWARE, n -lpnponariomorg nnnngana man 0F SEPARATINWaaQaaan,ama

@wenn Application med August ,ingaan lfsriaiNo, hasta My invention relates to a m rating anethol from pine oil.

`about 235 C. has heretofore been recognized as a constituent of oil of anise and has been,

@which is, shown a: flowA sheet,lfthes1pine soil is Lciirsttfractionated into three@A ents.; numberedf derived from anise seed, beingused princi-1,

pally as a flavoring. However, anethol has not heretofore been recognized as aconstituent of pine oil.

ered that anethol is present in pine oil andi` my invention has for its object the provision of a method for eiectin anethol from pine oil. o

According .to the method embodying my invention, pine oil'is fractionated and cuts having a boiling range below about 220 C.

and between about 220 C.-250 C. and above about 250V C.,` respectively, are obtained;`

, contains the major proportion o presentin the original-pine oil.

The cut after treatment is refractionatedn up to about 250 C. and thedistillate refrige ing cooled to elect crystallizationof anethol,

35 which may then be recovered by iiltration or' 1 centrifugation. IVhere the cut of` higher boiling range is substantially rich in lanethol,`

quor by filtration or cenf v l y y i fxlized anethol ffrom :cut- #8, thel moth The cut boiling ,b'etweenf220 C.-250 `f the anetholf,

u liquor :isuthen Arefra,ctioriatedi` int cntss numerated.' The refrigeration of thel distillatell the distillate obtained on refractionation of.

y this cutmay be cooled to efectfthecrystal-j` lization ofianethol and then filtered, `or centrifuged, for the separation of anethol. The

iiltrate thus obtained andtheresidue from the `refractionation of the cut of higher boiling range may be mixed Withthe filtrate ob- `tained from the refractionation of the cut of .lower boiling point and the mixture refractionated up 'to 240 C. The distillate ob`` tained is then-cooledto effect separation of the anethol, which isse or centrifugation.

parated by ltration, Y y f Y of my invention as described herein specifiiflc20` ethod of sepaQn theccarryinglouto the ,I process.. embodying my -imientioniand@v with Anetho'l, Which has a boiling point of referencextoiv V:the: accompanying drawL-ingl` in om ,the accompanying t; Cuts and #Baresetl v arefractionated linto cnts numbered non the ac- `avviing `1,12 and 3. aside.4 and climat?l is jscompanyingsdrawing ftand 6; ifGutsillil' y According to my mvention I lhave d1scov 6o effect 1 the 'crystallizationl therefromffof. ane

`.thol.` Thev l Crystallizatfionvl of; anethollttrom g the separation of@` cu`t=#5 maybe eiectedbysrefrigeratingland l :seeding ivvith Y a crystal preferably ot anethohfor ,bylrefrigeratmgi `andv inducing` .crystallin zationsbymechanicalmeans,

Lasbyadtling a small pieceaof fglass,f a egrainJi-ofwsandlor a .crystal,tonexample,loflsalt.` A i mfhfter. :the anethol is` crystallized;it-is lseparatedl from the'niother liquornbygfor"ezgam- 7o ap le;v=iltra,tion or centrifugation hefmother .beredf on the accompanying drawv f9..^Gutsf#7 i and i# Qt arefset asi ,A isi treated 'to effect 1crystallizatienv` therefrom` of anethol, which after .crystallizatioi may `be readily: separated byl tilt tionntrifugation.- Afterrthe separationliof t A CU quantities iffanethol recovered. `V Q L-xlhesprocess embodying iriylinyentionrnay be carriedl out; inf any" suitable-apparatusand theiftractionationsy may be i'ie'cte" with or Y i without lsteam and funden atmosphericd-or; rei-i ionation underi reduced pressure fis `\prelferfable since a f lower tempeifiture may be usedf'wlith less de- `compositionandkpolyinerization: andiavvith-the Predacton @f2 n @lues oflb im probably greateripurity. Y 4

In effecting the crystallization "ofanethol,` such may be accomplished by refrigeration or by refrigerating or cooling and seeding with a crystal,` preferably a crystal of anethol, orlff" i i Vinducing crystallization by mechanical `means, as by adding a smalljpiece of glass, `-.a grain of sand orithe like.` f

It will be understood that the carrying out cally with reference to the accompanying drawing is by Way of eXample only and shall not be taken as limiting my invention in its broader aspect.. ,5 Having now fully described my invention, what I claim and desire to protect by Letters Patent is 1. The method of separating anethol from pine oil which includes 'ractionating pine zo oil to obtain a cut boiling Within about the '0 range 2300 @-2400 and eecting crystallization of anethol as such therefrom.

2. The method of separating anethol from pine oil Which includes fractionating pine oil l5 to obtain a cut sufficiently rich in anethol and which will boil at normal atmospheric` pressure largely Within about the range 2200 @-2500 C., fractionating'the out to obtain a fraction boiling at normal atmospheric pressure ,largely Within about the range 2300 2400 C., and effecting crystallization of Y anethol from said fraction.

3. The method of separating anethol from pine oil which includes'fractionating pine oil to obtain a cut suiiiciently rich in anethol and Which will boilat normal atmospheric pressure largely Within aboutv the range 220O @-2500 C., ractionating the cut to obtain a fraction boiling at normal atmospheric pressure largely Within about the range 2300 @-2400 C., and cooling the cut to effect crystallization of anethol therefrom.V

4. The method of separating anethol from pine oil Which includes fractionating pine oil f5 to obtain a cut suiiiciently rich in anethol and Which will boil at normal atmospheric pres? sure largely Withinv about the range 220'0 250o C., fractionating the cut to obtain a frac- -V tion boiling at normal'atmosphe'ric pressure largely Within about the range 2300 @-2400 Y C., and cooling and seeding the cut to eect crystallization of anethol therefrom.

5. The method'of separating anethol from pine oil which includes fractionating pine oil to obtain a cut suiiiciently rich in anethol and Which'vvill boil at normal atmospheric pressure largely Within about the range 2200 @-2500 C., refractionating the cut to obtain a cut boiling at normal atmospheric pressure largely Within about therange 2320. @-237 0 C., and cooling and seeding the cut to effect crystallization of anethol therefrom.

In testimony of Which invention, I have hereunto set my hand, at Kenvil, New Jersey, on this 1st day of August, 1927.

' LEE T. SMITH. 

